Guangzhou Eric Wei Chemical Co., Ltd.
Guangzhou Eric Wei Chemical Co., Ltd.

BASF FoamStar SI2201 Defoamer

BASF FoamStar SI2201 Defoamer is a silicone-based, water-dispersible defoaming agent designed for demanding aqueous industrial processes. Part of BASF’s high-performance FoamStar SI series, it delivers rapid foam knockdown and lasting suppression in coatings, adhesives, and cleaning formulations. Its low-foam, non-silicone-residue profile ensures compatibility and surface quality without compromising efficiency or stability.
  • basf foamstar si2201 defoamer_e56689f9
  • basf foamstar si2201 defoamer_e56689f9

Features Of BASF FoamStar SI2201 Defoamer

  1. Highly effective silicone-based defoamer for rapid foam knock-down and long-term foam suppression.

  2. Excellent compatibility with water-based systems, including acrylic, styrene-acrylic, and vinyl acetate emulsions.

  3. Low dosage requirement ensures cost-efficiency without compromising performance or film integrity.

  4. Stable under high-shear mixing and elevated temperatures typical in industrial coating and adhesive production.

  5. Non-yellowing and non-migrating — preserves clarity and color stability in sensitive applications.

Typical Applications Of BASF FoamStar SI2201 Defoamer

  1. Architectural and industrial waterborne coatings (e.g., interior/exterior paints, primers).

  2. Water-based adhesives and sealants (e.g., laminating adhesives, construction sealants).

  3. Textile and leather finishing formulations requiring low-foam processing.

  4. Water-based printing inks and overprint varnishes.

  5. Construction chemicals such as cementitious tile adhesives and grouts.

Specifications Of BASF FoamStar SI2201 Defoamer

Chemical TypeSilicone oil-in-water emulsion
Product FormLiquid
AppearanceOpaque white to off-white emulsion
pH (1% aqueous solution)6.0 – 8.0
Specific Gravity (20 °C)1.00 – 1.04 g/cm³
Viscosity (Brookfield RV, 25 °C)100 – 300 mPa·s
Freeze-Thaw StabilityStable after 3 cycles (–15 °C / 23 °C)
Recommended Storage Temperature5 – 35 °C


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